Over the years, fantasy has varied from stand-alone novels to trilogies, to 5 book trilogies, to 10 or more book series. Topics have varied even more so, including elves and dwarves; farmer's sons or daughters who are prophesied to save the world; young thieves who find themselves caught up in world changing events; telepathic companions; magic; mysteries and more.

What are the appeals of these type of stories? Which have been overdone? Which have plenty of life left? What's currently hot in fantasy?